# What is the equation in standard form of the parabola with a focus at (4,3) and a directrix of y= -3?

##### 1 Answer

Jul 11, 2017

#### Explanation:

The focus must be the same distance from the vertex as the directrix for this to work. So apply the Midpoint theorem:

which gets you a vertex of

Your vertex is the coordinate *vertical* parabola format...

Now we simplify.

Standard form is